Cadillac will reveal its redesigned 2015 Escalade next month, and the 2015 Lincoln Navigator will be refreshed as well, with Lincoln's split grille and, we expect, new powertrains to better compete in the full-size luxury SUV segment. A 2015 Lincoln Navigator prototype was recently caught testing, revealing hints about the big SUV's new look.

This prototype suggests that the 2015 Lincoln Navigator will continue to ride on the same Ford F-150-based platform, rather than transitioning to the new F-150 platform that should debut sometime next year. Overall, the profile of the SUV appears to change little, with the biggest change coming to the front fascia. The current Navigator has been around mostly unchanged since 2007, and the new model will feature Lincoln's split grille design for a more modern, sweeping look up front. From what can be seen through the disguise, the rear end of the Navigator should feature a new taillight design.

The 2015 Lincoln Navigator will continue to offer two wheelbase lengths, the standard Navigator and the extended Navigator L. On the inside, expect the Navigator to adopt Lincoln's controversial MyLincoln Touch infotainment interface with touch-capacitive controls and a larger touch screen on the console.

Mechanically, the 2015 Lincoln Navigator might gain a version of Ford's EcoBoost engine, most likely the 3.5-liter twin-turbo V-6 found in the Ford F-150. This could hopefully increase fuel economy as well as power compared with the current Navigator's 5.4-liter V-8, which achieves 13/18 mpg city/highway with four-wheel-drive.

Look for the 2015 Lincoln Navigator to make its debut sometime next year along with the 2015 Ford Expedition. Our spy shots indicate the Expedition will also receive a face lift for 2015, although it may offer both its current V-8 engine and the aforementioned EcoBoost V-6.

Photo Source: KGP Photography